Don't know why, I just can't process this macro through. But earlier days it was totally ok.
I got the following message using this Macro 
Display Last KM Macro Error - Macro Library - Keyboard Maestro Discourse
/Users/as/Downloads/111 copy 2.txt
2018-04-02 20:31:09 Read File action failed because source is not a full path objc[15833]: Class FIFinderSyncExtensionHost is implemented in both /System/Library/PrivateFrameworks/FinderKit.framework/Versions/A/FinderKit (0x7fffad677b68) and /System/Library/PrivateFrameworks/FileProvider.framework/OverrideBundles/FinderSyncCollaborationFileProviderOverride.bundle/Contents/MacOS/FinderSyncCollaborationFileProviderOverride (0x10e4f5cd8). One of the two will be used. Which one is undefined.
/Users/as/Downloads/111 copy 2.txt In macro “[FILE] Process Lines in Text File” (while executing Read File to Variable “myLines”).